Every silicone rubber bands quotation must state Shore A or Shore D hardness before two prices mean the same thing. Ask for the method (for example ASTM D2240) and the specimen. Do not accept “70 Shore” without the scale.
State packing: loose count, bagged, boxed, or on a reel. Inner wrap and pallet pattern change landed cost. A cheaper EXW number with different packing is a different deal.
Evidence should attach to the quoted band line: dimensional report, hardness report, and any named food-contact or REACH declaration. A general capability claim is not evidence.